Weighing scale



Oct. 1151927. I 1,645,328

J HOPKINSON WEIGHING SICALE Fil ed March 16, 1926- 2 Sheets-Sheet 1 1 i 645 328 Oct. 11, 1927. r J. HOPKINSON WEIGHING SCALE Filed March 16, 1926 2 Sheets-Sheet 2 q- I to Q g g b Q l O N S w v w Q) u no I.

Patented @ct. ill,

JOSEPH HOPKINSO'N, 0F DAYTON, OHIO, ASSIGNOB TO DAYTON SGALE CGMPANY, OF

DAYTON, OHIO, A CORPORATIOHLOF NEW JERSEY.

WEIGHING SCALE.

Application filed March 16,,1926. Serial No. 95,608.

This invention pertains to weighing scales of the (even balance) automatic type in which the goods pan and weight pan are pans, while others have their charts at right angles to that plane.

The particular object of this invention is to disclose a modification of such a scale in which the chart and housing enclosing it may easily be changed to face in any desired direction, either by the manufacturer or by the user. Attempts have been made to solve this problem but without entire success. It has leen proposed to mount the upright housing rotatably on top of the casing which encloses the lever system of the scale but that is not satisfactory as it requires a heavy base casing as well as otherwise unnecessary machine work thereon, thereby adding to the cost of the machine. Also, other designs have not been symmetrical in appearance, the center of the vertical housing not being on the center line of the balance of the machine.

My present invention discloses adesign in which the vertical housing is carried not .on the. casing of the base lever system but on the base that supports the working parts of he scale, thereby not only providing a suitable rigid foundation for the housing, but permitting the use of a very light casing for the base levers, if desired. My design is also symmetrical in outline whichever direction the chart may be facing, thereby adding to the attractiveness of the appearance of the machine.

In the drawings,

Fig. 1 is a side elevation partly in section of my complete machine.

Fig. 2 is a plan in section on line 2-2 of Fig. 1 showing one position of vertical housing relative to goods pan.

Fig. 3 is a plan in section on line 22 of Fig. 1 showing another position of vertical housing relative to goods pan.

Fig. at is an enlarged detail View of the swivel connection on the lower end of the tape which connects the cam to the lever system. I

Fig. 5 is a longitudinal sectional View on line 55 of Fig. 6 showing a particular modification of a machine embodying my invention.,

Fig. 6 is a sectional View on line 66 of Fig. 5. In Fig. 1, 10 is the base of the machine and 12 is a centrally located upright pillar or pedestal rigidly mounted on base 10. 14 is the main lever of the evenbalance lever system, which for purpose of illustration is assumed to be of the Beranger type. Other lever systems may be used if desired, as the particular form of lever system has no hearing on the invention.v Lever 14 is pivotallymounted on pillar12 at 16, and the lever system carries in the well known manner a weight pan 18 and a goods pan 20. The casing 22. encloses the base mechanism, suitable openings through the top of the casingbeing provided for the stems of the pans and for 7s 2 standard 12.

The upper portion of pedestal 12 is preferably inthe form of a circular tube, on which is snugly fitted the lower end of upright housing 23, which may be rotated to so face in any desired direction, being held in position as by a set screw 24. The lower edge of housing 23 is beaded as at 26 or otherwiseenlarged in any preferred manner to cover easily the ring shaped space between as pedestal 12 and casing 22, thereby helping to keep dust and dirt out of the base with out expensive fitting of parts.

Fast to the skeleton 28 which supports weight pan 18 is an arm 30 extending upno wardly into housing and having at its free end a cone shaped pivot 32 located exactly on the vertical center line of pillar 12 and housing 23.

Arm 30 is connected v to pendulum cam 34: as

v by tape 36, provided at its lower end with a shackle 38 which carries a cup bearing" 4.0 in which rests the cone pivot 32. Shackle 38 18,80 designed as to permit wide rotation in either direction before contacting with we" ,guard plate hanging freely from a pin in shackle 38 to prevent arm 30 from accidently rising sufliciently to allow pivot 32 to rise out of its bearing 40. Plate 42 may be swung to one side whenever the operator 10 Wishes to separate arm and shackle 38, intentionally. An opening is provided in housing 23 at44; to provide access to the above bearing for assembly and adjustment purposes. This opening is normally closed by a cover such as 46.

During the manufacture of the scale, after the base lever system is assembled, casing 22 is slipped over the top of pillar l2 and then upright housing 23 is placed in position and fastened by screw 24. Connection of shackle 38 to arm 30 is made through opening 44.

I have illustrated the preferred form of my design, but it. should be understood that modification of details may be made Without departing from the spirit of my invention. Such a modification is shown in Figs. 5 6, to the various parts of which have been a plied the same reference numerals used in l, 2, 3 and 4t.

In Figs. 5 and 6, upright housing 23 is joined to pedestal 12 by fiance 50, locked position by screws'52 scopic joint previously lever casing 22 has a removabl l and a removable coliar 56 ser es to enclose the space between cover plate fie and tne central vertical housing 223. The removable portion of the vertical housing is secured to flange by a dowel pin 58.

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Adjustable bumpers 66 are provided on which rest one or the other ofcross members (32 of lever 1% when in its loivest position. Shot cups (S lfuri sh convenient receptacles for balancing material. is a level set into cover plate 54-. and (SS is a vibration-ehecking dash pot having its plunger attached to a cross arm (32 by. a horizontal bracket Z 0. An opening 72 is provided i. casing 22 permit access to the dash pot for adjustmen-t or filling. Q'pening 2 is normally closed by a door 74 pivoted at 76.

For the purpose of aiding the adjustment oh the scale for accurate Weighing, the fulcr'un'i bearing stands 78 of auxiliary levers 80 are settable lengthwise of the machine by means of screws 82,

Arm 30 instead of being fast to the platform skeleton 28, is secured to an end of one of the levers 80, Which moves the same vertical distance as the platform. The remaining details of the lever system'of Figs. 5 and.

Which means is provided to lock said vertical housing for operation in any desired position.

3. In an automatic Weighing scale, in combination, a supporting base, an equal arm type of lever system supported for operation on said base, an enclosing casing for said lever system, a pendulum, a chart, an indicator cooperating therewith, a housing supporting said. pendulum, chart, and indicator for ration above said lever system, said housing being mounted for rotation on said base independen of said enclosing casing.

an automatic Weighing bination, base, equai arm lever system mounted for operation on said base, a casing enclosing said lever system, a chart, an indicator cooperating With said chart, said chart and indicator being supported for operation above said lever system, a housing enclosing said chart and indicator, said housing and chart being rotatable about a vertical axis to .a plurality of operative positions, said casing and vertical housings being symmetrical about common vertical axis in any operative position of the vertical housing.

5. In an automatic Weighing scale, in combination, a base, a lever system, a casing enclosing'said lever system, a chart, an indicator cooperating therewith, and an upright housing enclosing said chart and indicator, said upright housing being supported on the base by a telescopic tubular joint by means of which said upright housing may be r0- tated about a vertical axis to any desired operative position.

In testimony whereof I hereto afix my si gnature.

aosiaria HOPKINSON.

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